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Recognize "bswapq" as an alternate spelling for the bswap instruction.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67071 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2009-03-17 02:17:27 +00:00
parent c39b80fdfc
commit d73566609e
2 changed files with 14 additions and 2 deletions
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4
lib/Target/X86/X86TargetAsmInfo.cpp
View File

@ -411,8 +411,8 @@ bool X86TargetAsmInfo<BaseTAI>::ExpandInlineAsm(CallInst *CI) const {
// bswap $0
if (AsmPieces.size() == 2 &&
AsmPieces[0] == "bswap" && (AsmPieces[1] == "$0" ||
AsmPieces[1] == "${0:q}")) {
(AsmPieces[0] == "bswap" || AsmPieces[0] == "bswapq") &&
(AsmPieces[1] == "$0" || AsmPieces[1] == "${0:q}")) {
// No need to check constraints, nothing other than the equivalent of
// "=r,0" would be valid here.
return LowerToBSwap(CI);

12
test/CodeGen/X86/bswap-inline-asm.ll Normal file
View File

@ -0,0 +1,12 @@
; RUN: llvm-as < %s | llc -march=x86-64 > %t
; RUN: not grep APP %t
; RUN: grep bswapq %t | count 2
define i64 @foo(i64 %x) nounwind {
%asmtmp = tail call i64 asm "bswap $0", "=r,0,~{dirflag},~{fpsr},~{flags}"(i64 %x) nounwind
ret i64 %asmtmp
}
define i64 @bar(i64 %x) nounwind {
%asmtmp = tail call i64 asm "bswapq ${0:q}", "=r,0,~{dirflag},~{fpsr},~{flags}"(i64 %x) nounwind
ret i64 %asmtmp
}